------- Comment #5 from hjl dot tools at gmail dot com 2008-01-20 16:34 -------
Should we also update REG_FREQ_CALLS_CROSSED whenever REG_N_CALLS_CROSSED
is updated? In regmove.c, there are
delete_insn (q);
INC_REG_N_SETS (REGNO (src), -1);
REG_N_CALLS_CROSSED (REGNO (src)) -= num_calls2;
REG_LIVE_LENGTH (REGNO (src)) -= s_length2;
insn_const = 0;
...
if (src_note)
{
/* Move the death note for SRC from INSN to P. */
if (! overlap)
remove_note (insn, src_note);
XEXP (src_note, 1) = REG_NOTES (p);
REG_NOTES (p) = src_note;
REG_N_CALLS_CROSSED (REGNO (src)) += s_num_calls;
}
INC_REG_N_SETS (REGNO (src), 1);
INC_REG_N_SETS (REGNO (dst), -1);
REG_N_CALLS_CROSSED (REGNO (dst)) -= num_calls;
There is we only update REG_N_CALLS_CROSSED, not REG_FREQ_CALLS_CROSSED.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34852
